NEW YORK (TheStreet) -- Shares of The Southern Company are trading lower -0.41% to $45.63 in pre-market trading on Thursday following a ratings downgrade. The holding company was downgraded to "sector perform" from "outperform" at RBC Capital. The firm downgraded the company's rating based on a valuation call. Must Read: Warren Buffett's 10 Favorite Growth Stocks STOCKS TO BUY: TheStreet Quant Ratings has identified a handful of stocks that can potentially TRIPLE in the next 12 months.